Lesson Example Discussion Quiz: Class Homework |
Step-4 |
Title: Equivalent expressions |
Grade: 1400-a Lesson: S1-L5 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
Step | Type | Explanation | Answer |
---|---|---|---|
1 |
Problem |
Simplify the expression \$((2x^3y^2)(-3xy^4)^2) / (6x^4y^3)^2\$. |
|
2 |
Step |
Given expression is |
\$((2x^3y^2)(-3xy^4)^2) / (6x^4y^3)^2\$ |
3 |
Hint |
First, let’s simplify each part individually |
\$(2x^3y^2) = 2x^3y^2\$ \$(- 3xy^4)^2 = (-3)^2 times (x)^2 times (y^4)^2 = 9x^2y^8\$ \$(6x^4y^3)^2 = (6)^2 times (x^4)^2 times (y^3)^2 = 36x^8y^6\$ |
4 |
Step |
Now plug these values back into the expression |
\$((2x^3y^2)(9x^2y^8) )/ (36x^8y^6)\$ |
5 |
Step |
Combine like terms by multiplying coefficients and adding exponents of variables |
\$(2 times 9 times x^3 times x^2 times y^2 times y^8) / (36 times x^8 times y^6)\$ \$(18x^5y^10) / (36x^8y^6)\$ \$(x^5y^10) / (2x^8y^6)\$ |
6 |
Step |
After simplification |
\$(1/2) times (x^5 / x^8) times (y^10 / y^6)\$ \$(1/2) times x^(5 - 8) times y^(10 - 6)\$ \$(1/2) times x^(- 3) times y^4\$ \$(1/2) times y^4 / x^3\$ |
7 |
Step |
Therefore, the simplified expression is \$(1/2) times y^4 / x^3\$. |
|
8 |
Choice.A |
Option A inaccurately presents \$−(y^4)/(2x^3)\$, due to the inclusion of a negative sign, rendering it incorrect |
\$ - y^4 / (2x^3)\$ |
9 |
Choice.B |
It simplifies to \$y^3/(2x^2)\$, differing from our derived simplified form, thus incorrect |
\$ y^3 / (2x^2)\$ |
10 |
Choice.C |
Correct: It precisely performs the calculations with accuracy |
\$ (1/2) times y^4 / (x^3)\$ |
11 |
Choice.D |
\$−(y^3)/(2x^2)\$, is invalid as it diverges from the simplified expression due to calculation errors |
\$ (- y^3) / (2x^2)\$ |
12 |
Answer |
Option |
C |
13 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
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